I was having some trouble with a print whose first layer had a large number of small holes across the whole area. I assume this required the nozzle to do a lot of retractions to make all the small circles. This got me wondering if the extrusion test, there was a test for calibrating the correct retraction distance for the current filament.
I have no problems with printing as my problems seemed to be glue quality, which I solved.
I still am curious if retraction distance is part of the extrusion tests and if not does it make sense to add it?
-Erik